#333.364
Aggron/Ferrothorn
333.364
steelgrass
#364.333
Ferrothorn/Aggron
364.333
steelrock

71(-1)
HP
72(+1)
99(-5)
ATK
104(+5)
147(-16)
DEF
163(+16)
58(+2)
SP.ATK
56(-2)
78(-19)
SP.DEF
97(+19)
30(-10)
SPEED
40(+10)
483(-49)
TOTAL
532(+49)

Regular
Sturdy: Can't be 1-hit KO'd at full HP.
Rock Head: Doesn't take recoil damage.
Iron Barbs: Attackers lose 1/8th max HP on contact.
Hidden
Heavy Metal: Double the normal weight for its species.
Iron Barbs: Attackers lose 1/8th max HP on contact.

x4
fire
fightingground
x4
x2
fighting
water
x2
x1
bugdarkflyingghostgroundice
darkelectricfireghostgrasssteel
x1
x1/2
dragonelectricfairynormalpsychicrocksteelwater
bugdragonfairyicepsychicrock
x1/2
x1/4
grass
flyingnormal
x1/4
x0
poison
poison
x0

#390
Aron
390
steelrock
Lv.32
#391
Lairon
391
steelrock
Lv.42
#333
Aggron
333
steelrock
#413
Ferroseed
413
steelgrass
Lv.40
#364
Ferrothorn
364
steelgrass